Hi Elang

So I am dropping math formulas, which may have required numerical methods anyway.
MoI has some intrinsic way of making curves match up...

Establish the base line of sqrt(2), by typing it in the command window when creating a horizontal line.
Create an edge pentagon, with base of sqrt(2).
The other 4 sides are too long, so the final circle is contained inside the pentagon.
Create a line of 1 unit along the right leg of the pentagon, and also a perpendicular bisector, which will pass through the eventual final circle center.
Mirror will create the left leg.
Rotating the right leg, will rotate the left leg, due to History.
Need to tie the upper two arms in somehow.
Many 3 point circles will pass through the two base points, and the top of the right leg.
...???...

- Brian